Standard pull is 5.5 pounds-it can be lightened with factory parts by an armorer to 3.5-I would recommend that pull for competition only.
It can also be raised to 8 and 11.5 pounds through factory parts. Police departments use these often for liability reasons.
There is one other configuration that puts it at 6 pounds, but smooths the pull quite a bit. It's done by using the 8 pound NY Trigger spring with a 3.5 pound connector. An armorer can do it-It is not in any of the manuals-but taught in the armorers school.
I like that set up and have used it on my personal Glocks